Iadrat Ploychanok, Jongthong Jananya, Prasertsab Anittha, Thanphrom Sukonlaphat, Toewiwat Neal, Ittisanronnachai Somlak, Wongnate Thanyaporn, Wattanakit Chularat
School of Molecular Science and Engineering (MSE), Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand.
School of Energy Science and Engineering (ESE), Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand.
ACS Appl Mater Interfaces. 2023 Sep 13;15(36):42854-42867. doi: 10.1021/acsami.3c08467. Epub 2023 Aug 31.
The rational design of interface materials containing carbon nanotubes (CNTs) and zeolites (zeolite-CNTs) is a promising perspective in chemical and biochemical communities because they exhibit several outstanding properties such as tunable hydrophobicity-hydrophilicity at interfaces. In this contribution, we report the fabrication of Ag-incorporated nanocrystalline BEA-carbon nanotube (CNT) composites via the one-pot inter-zeolite transformation of the micron-sized FAU-CNT composite in the presence of a Ag precursor. By varying the crystallization time, the inter-zeolite transformation mechanism was explored. Indeed, this process involves an amorphous intermediate of aluminosilicate species with a significant change of the crystal morphology in the presence of CNTs in the synthesis gel. Interestingly, the redispersion of metal particles was observed after the inter-zeolite transformation process, resulting in the high dispersion of metal nanoparticles over BEA nanocrystals. Notably, it was revealed that the Ag sites were also stabilized in the presence of CNT interfaces, leading to the availability of highly active Ag ions. To illustrate the beneficial aspect of designer materials, the synthesized Ag-incorporated BEA-CNT composites exhibited high antibacterial activity against due to the synergistic effect of the active Ag species and appropriate hydrophobic and hydrophilic properties of the hybrid material interfaces. This first example opens up perspectives of the rational design of zeolite-CNT interfaces with high metal dispersion via the inter-zeolite transformation approach for biomedical applications.
包含碳纳米管（CNT）和沸石（沸石 - CNT）的界面材料的合理设计在化学和生物化学领域是一个很有前景的方向，因为它们在界面处展现出诸如可调节的疏水性 - 亲水性等若干出色特性。在本论文中，我们报道了通过在银前驱体存在下对微米级FAU - CNT复合材料进行一锅法沸石间转化来制备掺银的纳米晶BEA - 碳纳米管（CNT）复合材料。通过改变结晶时间，探索了沸石间转化机制。实际上，此过程涉及铝硅酸盐物种的无定形中间体，在合成凝胶中有CNT存在时晶体形态发生显著变化。有趣的是，在沸石间转化过程之后观察到了金属颗粒的再分散，导致金属纳米颗粒在BEA纳米晶体上高度分散。值得注意的是，研究表明在CNT界面存在时银位点也得以稳定，从而使得高活性银离子得以存在。为了说明设计材料的有益之处，合成的掺银BEA - CNT复合材料由于活性银物种的协同作用以及杂化材料界面适当的疏水和亲水性质，表现出高抗菌活性。这个首个例子为通过沸石间转化方法实现具有高金属分散性的沸石 - CNT界面的合理设计以用于生物医学应用开辟了前景。
